Why no snipers? Boooring! People want action and excitement. A guy that's dressed like a buxus and doesn't move an inch during the whole game is not what they're paying to see!
There is also that. When you consider video gamer complaints about "campers," and combine it with football-fan's complaints when nothing decides a game but field goals (instead of folks ever going for the touchdown) or when kick-offs result in taking a knee (instead of making a break for it), etc, etc?
The last thing Urban Brawl wants is leagues made up for sniper/spotter combos, just plinking away from cover at anyone that tries to move the ball. They like pistols and submachineguns, short-ranged weapons that can lay down a lot of lead, be used on the move (at least moreso than a sniper rifle), and will look awesome on the big screen. It's a game that
forces you to advance the ball or be penalized -- they don't want campers and snipers, they want rushers and assault troops. The sport encourages melee combat, for pete's sake!